The study of economics provides insight into the way a market economy works. This is done by studying how human beings, both individually and collectively, respond to market signals and incentives. A necessary corollary to this is that the study of economics provides insight into how government policy—through monetary and fiscal policy as well as regulatory policy, including both price and environmental regulation— affects market economies function and therefore the overall welfare of society. The entrepreneur, policy maker, or market analyst who understands these various facets of modern economies is often able to make better and/or more informed decisions. The study of economics also provides the student with important analytical skills that can be applied in real-world, business decision making. These skills are important in other business disciplines such as accounting, marketing, management and finance.